Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22ab6235c77527b…

MALICIOUS

PDF

43.8 KB Created: 2020-08-08 00:20:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d3a051862770b5e6dcc1f57dba730b4f SHA-1: 2417696c58cd43e13af17b5076df900c80b9aeeb SHA-256: b22ab6235c77527b50342884e746c83d5c2796a305a420312c70d9a335fb7a11
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests a coordinated effort to distribute malicious content or conduct phishing. The ML classifier strongly supports the malicious nature of this PDF. No scripts were extracted, so the attack pattern is inferred from the link farm and redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.ru/pify?keyword=suffixes+worksheets+pdf In PDF document text
    • http://files.drdecks.com/uploads/1/3/1/3/131378899/4030219.pdfIn PDF document text
    • http://files.soulreflexions.com/uploads/1/3/1/4/131438829/tisemufunirogebuke.pdfIn PDF document text
    • http://files.chardoncommunityactionteam.org/uploads/1/3/1/3/131384018/pugotut-newifuniz.pdfIn PDF document text
    • http://files.wicknsudsbydino.com/uploads/1/3/1/3/131398573/8728590.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/85986419962.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1588/9305/files/48813168267.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0097/7816/files/28964918977.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5970/7037/files/32117086738.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7594/5126/files/30218835055.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4680/5404/files/lowatikibi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5517/6097/files/cardiovascular_system_worksheet_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9739/1261/files/bar_graph_matplotlib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/kuwamikitoneleferane.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000608f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608F 4988 bytes
SHA-256: 40957b9fd2b2f3bcfa97c2c94a0168dd9f9d1b6f8dd7817331c23d61f11ee370
font_01_sfnt_off000071ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71BA 10192 bytes
SHA-256: 3cf83f024ad25ade2d241aa2148a136819409cc6d55407dfc89b4cb46470c7bb
font_02_sfnt_off0000949e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x949E 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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